Mark Lord wrote:
Jeff Garzik wrote:
Yinghai Lu wrote:
On Sat, Dec 6, 2008 at 3:48 PM, Jeff Garzik <jeff@xxxxxxxxxx> wrote:
..
interesting, so will get /dev/ada instead of /dev/sda?
That is an interesting question. The easiest thing is to allocate a
new 32-bit block major. But the more compatible (and more
controversial) solution is to allocate from the SCSI disk blkmajor space.
..
Perhaps "sdx" and "scdx" should simply be redefined as "System disk"
and "System CD", and moved under block layer ownership from SCSI ?
Yes, precisely. SCSI and libata (and others) would allocate disk/MMC
majors from the block layer.
The biggest problem with this plan is that it introduces a mismatch in
ioctl capabilities, a behavior change from the current situation where
SCSI exports SCSI_IOCTL_SEND_COMMAND in addition to the more universal
SG_IO. Installers and existing clients may rely on this portion of the
Linux application ABI.
Jeff
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